Biological soil crusts alleviate the stress of arsenic on rice germination and the underlying immobilization mechanisms

The high concentration of arsenic (As) in paddy soil has seriously threatened the growth of rice and human food safety. Biological soil crusts (BSC), which are ubiquitous in paddy fields, have been shown a high ability to capture trace metal elements. In the present study, we investigated the effect...

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Autores principales:	Shiwei Yan, Jianhao Yang, Song Zhou, Yuetong Yan, Xianjin Tang, Youhua Ma, Hongxiang Hu, Wenling Ye
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Arsenic Bacteria diversity Biological soil crusts Bioremediation Distribution Environmental pollution TD172-193.5 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/1a7343b8a95e43389e4f59620d7c3fc1
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spelling	oai:doaj.org-article:1a7343b8a95e43389e4f59620d7c3fc12021-11-06T04:13:44ZBiological soil crusts alleviate the stress of arsenic on rice germination and the underlying immobilization mechanisms0147-651310.1016/j.ecoenv.2021.112839https://doaj.org/article/1a7343b8a95e43389e4f59620d7c3fc12021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0147651321009519https://doaj.org/toc/0147-6513The high concentration of arsenic (As) in paddy soil has seriously threatened the growth of rice and human food safety. Biological soil crusts (BSC), which are ubiquitous in paddy fields, have been shown a high ability to capture trace metal elements. In the present study, we investigated the effectiveness and mechanism of BSC for immobilizing As, and tested their potential to alleviate the stress of As on rice germination. It is found that BSC can remove 77.8% of arsenic in solution with 3.5 mg L−1 initial As concentration. The As content in BSC reached 514.5 mg kg−1 after 216 h exposure, and the entrapped As was mainly distributed in BSC as a non-EDTA-exchangeable fraction, which might be intracellularly accumulated. Proteobacteria and Bacteroidetes were the dominant phyla in BSC after being exposed to As, playing a significant role in tolerating As and As biogeochemical cycling. The presence of BSC notably promoted the germination rate (18.3%) and dry biomass (103.4%) of rice seeds under 3.5 mg L−1 As stress while reducing the As content in plant roots (8.2–34.3%) and shoots (8.7–47.6%). These findings demonstrate that BSC have a great entrapping effect on As and highlight the importance of BSC in alleviating the stress on rice germination by As, providing a potential nature-based and low-cost strategy to decontaminate paddy fields polluted with As.Shiwei YanJianhao YangSong ZhouYuetong YanXianjin TangYouhua MaHongxiang HuWenling YeElsevierarticleArsenicBacteria diversityBiological soil crustsBioremediationDistributionEnvironmental pollutionTD172-193.5Environmental sciencesGE1-350ENEcotoxicology and Environmental Safety, Vol 227, Iss , Pp 112839- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Arsenic Bacteria diversity Biological soil crusts Bioremediation Distribution Environmental pollution TD172-193.5 Environmental sciences GE1-350
spellingShingle	Arsenic Bacteria diversity Biological soil crusts Bioremediation Distribution Environmental pollution TD172-193.5 Environmental sciences GE1-350 Shiwei Yan Jianhao Yang Song Zhou Yuetong Yan Xianjin Tang Youhua Ma Hongxiang Hu Wenling Ye Biological soil crusts alleviate the stress of arsenic on rice germination and the underlying immobilization mechanisms
description	The high concentration of arsenic (As) in paddy soil has seriously threatened the growth of rice and human food safety. Biological soil crusts (BSC), which are ubiquitous in paddy fields, have been shown a high ability to capture trace metal elements. In the present study, we investigated the effectiveness and mechanism of BSC for immobilizing As, and tested their potential to alleviate the stress of As on rice germination. It is found that BSC can remove 77.8% of arsenic in solution with 3.5 mg L−1 initial As concentration. The As content in BSC reached 514.5 mg kg−1 after 216 h exposure, and the entrapped As was mainly distributed in BSC as a non-EDTA-exchangeable fraction, which might be intracellularly accumulated. Proteobacteria and Bacteroidetes were the dominant phyla in BSC after being exposed to As, playing a significant role in tolerating As and As biogeochemical cycling. The presence of BSC notably promoted the germination rate (18.3%) and dry biomass (103.4%) of rice seeds under 3.5 mg L−1 As stress while reducing the As content in plant roots (8.2–34.3%) and shoots (8.7–47.6%). These findings demonstrate that BSC have a great entrapping effect on As and highlight the importance of BSC in alleviating the stress on rice germination by As, providing a potential nature-based and low-cost strategy to decontaminate paddy fields polluted with As.
format	article
author	Shiwei Yan Jianhao Yang Song Zhou Yuetong Yan Xianjin Tang Youhua Ma Hongxiang Hu Wenling Ye
author_facet	Shiwei Yan Jianhao Yang Song Zhou Yuetong Yan Xianjin Tang Youhua Ma Hongxiang Hu Wenling Ye
author_sort	Shiwei Yan
title	Biological soil crusts alleviate the stress of arsenic on rice germination and the underlying immobilization mechanisms
title_short	Biological soil crusts alleviate the stress of arsenic on rice germination and the underlying immobilization mechanisms
title_full	Biological soil crusts alleviate the stress of arsenic on rice germination and the underlying immobilization mechanisms
title_fullStr	Biological soil crusts alleviate the stress of arsenic on rice germination and the underlying immobilization mechanisms
title_full_unstemmed	Biological soil crusts alleviate the stress of arsenic on rice germination and the underlying immobilization mechanisms
title_sort	biological soil crusts alleviate the stress of arsenic on rice germination and the underlying immobilization mechanisms
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/1a7343b8a95e43389e4f59620d7c3fc1
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Biological soil crusts alleviate the stress of arsenic on rice germination and the underlying immobilization mechanisms

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